Spada S Krebber C Plückthun A 1997 We review here advances in the selectively infective phage (SIP) technology, a novel method for the in vivo selection of interacting protein-ligand pairs. A 'selectively infective phage' consists of two components, a filamentous phage particle made non-infective by replacing its N-terminal domains of gene3 protein (g3p) with a ligand-binding protein, and an 'adapter' molecule in which the ligand is linked to those N-terminal domains of g3p which are missing from the phage particle. Infectivity is restored when the displayed protein binds the ligand and thereby attaches the missing N-terminal domains of g3p to the phage particle. Phage propagation becomes strictly dependent on the protein-ligand interaction. This method shows promise both in the area of library screening and in the optimization of peptides or proteins. https://sonar.ch/global/documents/185644 eng info:eu-repo/semantics/altIdentifier/doi/10.1515/bchm.1997.378.6.445 info:eu-repo/semantics/altIdentifier/pmid/9224923 Biological chemistry. - 1997 Bacteriophages Evolution, Molecular Genetic Engineering Humans Inoviridae Peptide Library Protein Engineering Selectively infective phages (SIP). http://purl.org/coar/resource_type/c_6501